Searching for Gary Brown, natural father

Hello there, I am searching for Gary W.Brown. He is my natural father. Gary was born between 1943 &1946. Gary has lived in Alaska, Hawaii and Michigan. He is about 5ft. 8in tall, has gray hair and blue eyes. His usual occupation is a bartender.I have been searching for my dad since 1979. If anyone has any information, please reply. Thank you, Sarah